Pre-populate choices for respondents

Let's say you are creating a customer satisfaction survey. You have a location drop down for respondents to choose their location but for some respondents you may already know their location and you want to save them the trouble of picking their location from a list.

Using SurveyTown you can pre-select an answer to a question using URL variables. The way it works is that you add the choice you want pre-selected to the URL. Here's an example.